2N® Lift8 Audio Unit – Fireman, Key (918615E) Technical Specifications Brand: 2N® Part Number: 918615E Function: Audio unit for fireman communication, enabling priority voice calls between the fire lift cabin and the firefighter staging area, compliant with EN 81-72 standard Installation: Designed for installation at the firefighter staging area; connects to 2N® Lift8 Central Unit via two-wire bus; activated by turning a triangular key switch to position “1” and pressing the “TALK” button Compatibility: Compatible with 2N® Lift8 systems (firmware version 1.6.0 and higher, with key activation supported from version 2.7.3); supports integration with 2N® Elevator Center for remote monitoring Control: Initiates top-priority calls, suspending other communications in the same shaft; supports PCMU, PCMA, G.711, L16, G.722, and G.729 audio codecs for high-quality audio; call setup signaled by LED Integration: Powered via two-wire bus; configurable via 2N® Service Tool or web interface; supports communication with cabin and machine room units; complies with EN 81-28 and EN 81-72 standards